Import sources from 2011-03-30 iso image

1 files changed, 182 insertions, 0 deletions

diff --git a/sys/src/cmd/ip/imap4d/utils.c b/sys/src/cmd/ip/imap4d/utils.c
new file mode 100755
index 000000000..6e081a62e
--- /dev/null
+++ b/sys/src/cmd/ip/imap4d/utils.c
@@ -0,0 +1,182 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <auth.h>
+#include "imap4d.h"
+
+/*
+ * reverse string [s:e) in place
+ */
+void
+strrev(char *s, char *e)
+{
+	int c;
+
+	while(--e > s){
+		c = *s;
+		*s++ = *e;
+		*e = c;
+	}
+}
+
+int
+isdotdot(char *s)
+{
+	return s[0] == '.' && s[1] == '.' && (s[2] == '/' || s[2] == '\0');
+}
+
+int
+issuffix(char *suf, char *s)
+{
+	int n;
+
+	n = strlen(s) - strlen(suf);
+	if(n < 0)
+		return 0;
+	return strcmp(s + n, suf) == 0;
+}
+
+int
+isprefix(char *pre, char *s)
+{
+	return strncmp(pre, s, strlen(pre)) == 0;
+}
+
+int
+ciisprefix(char *pre, char *s)
+{
+	return cistrncmp(pre, s, strlen(pre)) == 0;
+}
+
+char*
+readFile(int fd)
+{
+	Dir *d;
+	long length;
+	char *s;
+
+	d = dirfstat(fd);
+	if(d == nil)
+		return nil;
+	length = d->length;
+	free(d);
+	s = binalloc(&parseBin, length + 1, 0);
+	if(s == nil || read(fd, s, length) != length)
+		return nil;
+	s[length] = '\0';
+	return s;
+}
+
+/*
+ * create the imap tmp file.
+ * it just happens that we don't need multiple temporary files.
+ */
+int
+imapTmp(void)
+{
+	char buf[ERRMAX], name[MboxNameLen];
+	int tries, fd;
+
+	snprint(name, sizeof(name), "/mail/box/%s/mbox.tmp.imp", username);
+	for(tries = 0; tries < LockSecs*2; tries++){
+		fd = create(name, ORDWR|ORCLOSE|OCEXEC, DMEXCL|0600);
+		if(fd >= 0)
+			return fd;
+		errstr(buf, sizeof buf);
+		if(cistrstr(buf, "locked") == nil)
+			break;
+		sleep(500);
+	}
+	return -1;
+}
+
+/*
+ * open a file which might be locked.
+ * if it is, spin until available
+ */
+int
+openLocked(char *dir, char *file, int mode)
+{
+	char buf[ERRMAX];
+	int tries, fd;
+
+	for(tries = 0; tries < LockSecs*2; tries++){
+		fd = cdOpen(dir, file, mode);
+		if(fd >= 0)
+			return fd;
+		errstr(buf, sizeof buf);
+		if(cistrstr(buf, "locked") == nil)
+			break;
+		sleep(500);
+	}
+	return -1;
+}
+
+int
+fqid(int fd, Qid *qid)
+{
+	Dir *d;
+
+	d = dirfstat(fd);
+	if(d == nil)
+		return -1;
+	*qid = d->qid;
+	free(d);
+	return 0;
+}
+
+ulong
+mapInt(NamedInt *map, char *name)
+{
+	int i;
+
+	for(i = 0; map[i].name != nil; i++)
+		if(cistrcmp(map[i].name, name) == 0)
+			break;
+	return map[i].v;
+}
+
+char*
+estrdup(char *s)
+{
+	char *t;
+
+	t = emalloc(strlen(s) + 1);
+	strcpy(t, s);
+	return t;
+}
+
+void*
+emalloc(ulong n)
+{
+	void *p;
+
+	p = malloc(n);
+	if(p == nil)
+		bye("server out of memory");
+	setmalloctag(p, getcallerpc(&n));
+	return p;
+}
+
+void*
+ezmalloc(ulong n)
+{
+	void *p;
+
+	p = malloc(n);
+	if(p == nil)
+		bye("server out of memory");
+	setmalloctag(p, getcallerpc(&n));
+	memset(p, 0, n);
+	return p;
+}
+
+void*
+erealloc(void *p, ulong n)
+{
+	p = realloc(p, n);
+	if(p == nil)
+		bye("server out of memory");
+	setrealloctag(p, getcallerpc(&p));
+	return p;
+}